1 #include <linux/types.h> 2 #include <linux/init.h> 3 #include <linux/interrupt.h> 4 #include <linux/mm.h> 5 #include <linux/slab.h> 6 #include <linux/spinlock.h> 7 #include <linux/zorro.h> 8 9 #include <asm/page.h> 10 #include <asm/pgtable.h> 11 #include <asm/amigaints.h> 12 #include <asm/amigahw.h> 13 14 #include "scsi.h" 15 #include "wd33c93.h" 16 #include "gvp11.h" 17 18 19 #define CHECK_WD33C93 20 21 struct gvp11_hostdata { 22 struct WD33C93_hostdata wh; 23 struct gvp11_scsiregs *regs; 24 }; 25 26 static irqreturn_t gvp11_intr(int irq, void *data) 27 { 28 struct Scsi_Host *instance = data; 29 struct gvp11_hostdata *hdata = shost_priv(instance); 30 unsigned int status = hdata->regs->CNTR; 31 unsigned long flags; 32 33 if (!(status & GVP11_DMAC_INT_PENDING)) 34 return IRQ_NONE; 35 36 spin_lock_irqsave(instance->host_lock, flags); 37 wd33c93_intr(instance); 38 spin_unlock_irqrestore(instance->host_lock, flags); 39 return IRQ_HANDLED; 40 } 41 42 static int gvp11_xfer_mask = 0; 43 44 void gvp11_setup(char *str, int *ints) 45 { 46 gvp11_xfer_mask = ints[1]; 47 } 48 49 static int dma_setup(struct scsi_cmnd *cmd, int dir_in) 50 { 51 struct Scsi_Host *instance = cmd->device->host; 52 struct gvp11_hostdata *hdata = shost_priv(instance); 53 struct WD33C93_hostdata *wh = &hdata->wh; 54 struct gvp11_scsiregs *regs = hdata->regs; 55 unsigned short cntr = GVP11_DMAC_INT_ENABLE; 56 unsigned long addr = virt_to_bus(cmd->SCp.ptr); 57 int bank_mask; 58 static int scsi_alloc_out_of_range = 0; 59 60 /* use bounce buffer if the physical address is bad */ 61 if (addr & wh->dma_xfer_mask) { 62 wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff; 63 64 if (!scsi_alloc_out_of_range) { 65 wh->dma_bounce_buffer = 66 kmalloc(wh->dma_bounce_len, GFP_KERNEL); 67 wh->dma_buffer_pool = BUF_SCSI_ALLOCED; 68 } 69 70 if (scsi_alloc_out_of_range || 71 !wh->dma_bounce_buffer) { 72 wh->dma_bounce_buffer = 73 amiga_chip_alloc(wh->dma_bounce_len, 74 "GVP II SCSI Bounce Buffer"); 75 76 if (!wh->dma_bounce_buffer) { 77 wh->dma_bounce_len = 0; 78 return 1; 79 } 80 81 wh->dma_buffer_pool = BUF_CHIP_ALLOCED; 82 } 83 84 /* check if the address of the bounce buffer is OK */ 85 addr = virt_to_bus(wh->dma_bounce_buffer); 86 87 if (addr & wh->dma_xfer_mask) { 88 /* fall back to Chip RAM if address out of range */ 89 if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) { 90 kfree(wh->dma_bounce_buffer); 91 scsi_alloc_out_of_range = 1; 92 } else { 93 amiga_chip_free(wh->dma_bounce_buffer); 94 } 95 96 wh->dma_bounce_buffer = 97 amiga_chip_alloc(wh->dma_bounce_len, 98 "GVP II SCSI Bounce Buffer"); 99 100 if (!wh->dma_bounce_buffer) { 101 wh->dma_bounce_len = 0; 102 return 1; 103 } 104 105 addr = virt_to_bus(wh->dma_bounce_buffer); 106 wh->dma_buffer_pool = BUF_CHIP_ALLOCED; 107 } 108 109 if (!dir_in) { 110 /* copy to bounce buffer for a write */ 111 memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr, 112 cmd->SCp.this_residual); 113 } 114 } 115 116 /* setup dma direction */ 117 if (!dir_in) 118 cntr |= GVP11_DMAC_DIR_WRITE; 119 120 wh->dma_dir = dir_in; 121 regs->CNTR = cntr; 122 123 /* setup DMA *physical* address */ 124 regs->ACR = addr; 125 126 if (dir_in) { 127 /* invalidate any cache */ 128 cache_clear(addr, cmd->SCp.this_residual); 129 } else { 130 /* push any dirty cache */ 131 cache_push(addr, cmd->SCp.this_residual); 132 } 133 134 bank_mask = (~wh->dma_xfer_mask >> 18) & 0x01c0; 135 if (bank_mask) 136 regs->BANK = bank_mask & (addr >> 18); 137 138 /* start DMA */ 139 regs->ST_DMA = 1; 140 141 /* return success */ 142 return 0; 143 } 144 145 static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, 146 int status) 147 { 148 struct gvp11_hostdata *hdata = shost_priv(instance); 149 struct WD33C93_hostdata *wh = &hdata->wh; 150 struct gvp11_scsiregs *regs = hdata->regs; 151 152 /* stop DMA */ 153 regs->SP_DMA = 1; 154 /* remove write bit from CONTROL bits */ 155 regs->CNTR = GVP11_DMAC_INT_ENABLE; 156 157 /* copy from a bounce buffer, if necessary */ 158 if (status && wh->dma_bounce_buffer) { 159 if (wh->dma_dir && SCpnt) 160 memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer, 161 SCpnt->SCp.this_residual); 162 163 if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) 164 kfree(wh->dma_bounce_buffer); 165 else 166 amiga_chip_free(wh->dma_bounce_buffer); 167 168 wh->dma_bounce_buffer = NULL; 169 wh->dma_bounce_len = 0; 170 } 171 } 172 173 static int gvp11_bus_reset(struct scsi_cmnd *cmd) 174 { 175 struct Scsi_Host *instance = cmd->device->host; 176 177 /* FIXME perform bus-specific reset */ 178 179 /* FIXME 2: shouldn't we no-op this function (return 180 FAILED), and fall back to host reset function, 181 wd33c93_host_reset ? */ 182 183 spin_lock_irq(instance->host_lock); 184 wd33c93_host_reset(cmd); 185 spin_unlock_irq(instance->host_lock); 186 187 return SUCCESS; 188 } 189 190 static struct scsi_host_template gvp11_scsi_template = { 191 .module = THIS_MODULE, 192 .name = "GVP Series II SCSI", 193 .proc_info = wd33c93_proc_info, 194 .proc_name = "GVP11", 195 .queuecommand = wd33c93_queuecommand, 196 .eh_abort_handler = wd33c93_abort, 197 .eh_bus_reset_handler = gvp11_bus_reset, 198 .eh_host_reset_handler = wd33c93_host_reset, 199 .can_queue = CAN_QUEUE, 200 .this_id = 7, 201 .sg_tablesize = SG_ALL, 202 .cmd_per_lun = CMD_PER_LUN, 203 .use_clustering = DISABLE_CLUSTERING 204 }; 205 206 static int __devinit check_wd33c93(struct gvp11_scsiregs *regs) 207 { 208 #ifdef CHECK_WD33C93 209 volatile unsigned char *sasr_3393, *scmd_3393; 210 unsigned char save_sasr; 211 unsigned char q, qq; 212 213 /* 214 * These darn GVP boards are a problem - it can be tough to tell 215 * whether or not they include a SCSI controller. This is the 216 * ultimate Yet-Another-GVP-Detection-Hack in that it actually 217 * probes for a WD33c93 chip: If we find one, it's extremely 218 * likely that this card supports SCSI, regardless of Product_ 219 * Code, Board_Size, etc. 220 */ 221 222 /* Get pointers to the presumed register locations and save contents */ 223 224 sasr_3393 = ®s->SASR; 225 scmd_3393 = ®s->SCMD; 226 save_sasr = *sasr_3393; 227 228 /* First test the AuxStatus Reg */ 229 230 q = *sasr_3393; /* read it */ 231 if (q & 0x08) /* bit 3 should always be clear */ 232 return -ENODEV; 233 *sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */ 234 if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */ 235 *sasr_3393 = save_sasr; /* Oops - restore this byte */ 236 return -ENODEV; 237 } 238 if (*sasr_3393 != q) { /* should still read the same */ 239 *sasr_3393 = save_sasr; /* Oops - restore this byte */ 240 return -ENODEV; 241 } 242 if (*scmd_3393 != q) /* and so should the image at 0x1f */ 243 return -ENODEV; 244 245 /* 246 * Ok, we probably have a wd33c93, but let's check a few other places 247 * for good measure. Make sure that this works for both 'A and 'B 248 * chip versions. 249 */ 250 251 *sasr_3393 = WD_SCSI_STATUS; 252 q = *scmd_3393; 253 *sasr_3393 = WD_SCSI_STATUS; 254 *scmd_3393 = ~q; 255 *sasr_3393 = WD_SCSI_STATUS; 256 qq = *scmd_3393; 257 *sasr_3393 = WD_SCSI_STATUS; 258 *scmd_3393 = q; 259 if (qq != q) /* should be read only */ 260 return -ENODEV; 261 *sasr_3393 = 0x1e; /* this register is unimplemented */ 262 q = *scmd_3393; 263 *sasr_3393 = 0x1e; 264 *scmd_3393 = ~q; 265 *sasr_3393 = 0x1e; 266 qq = *scmd_3393; 267 *sasr_3393 = 0x1e; 268 *scmd_3393 = q; 269 if (qq != q || qq != 0xff) /* should be read only, all 1's */ 270 return -ENODEV; 271 *sasr_3393 = WD_TIMEOUT_PERIOD; 272 q = *scmd_3393; 273 *sasr_3393 = WD_TIMEOUT_PERIOD; 274 *scmd_3393 = ~q; 275 *sasr_3393 = WD_TIMEOUT_PERIOD; 276 qq = *scmd_3393; 277 *sasr_3393 = WD_TIMEOUT_PERIOD; 278 *scmd_3393 = q; 279 if (qq != (~q & 0xff)) /* should be read/write */ 280 return -ENODEV; 281 #endif /* CHECK_WD33C93 */ 282 283 return 0; 284 } 285 286 static int __devinit gvp11_probe(struct zorro_dev *z, 287 const struct zorro_device_id *ent) 288 { 289 struct Scsi_Host *instance; 290 unsigned long address; 291 int error; 292 unsigned int epc; 293 unsigned int default_dma_xfer_mask; 294 struct gvp11_hostdata *hdata; 295 struct gvp11_scsiregs *regs; 296 wd33c93_regs wdregs; 297 298 default_dma_xfer_mask = ent->driver_data; 299 300 /* 301 * Rumors state that some GVP ram boards use the same product 302 * code as the SCSI controllers. Therefore if the board-size 303 * is not 64KB we assume it is a ram board and bail out. 304 */ 305 if (zorro_resource_len(z) != 0x10000) 306 return -ENODEV; 307 308 address = z->resource.start; 309 if (!request_mem_region(address, 256, "wd33c93")) 310 return -EBUSY; 311 312 regs = (struct gvp11_scsiregs *)(ZTWO_VADDR(address)); 313 314 error = check_wd33c93(regs); 315 if (error) 316 goto fail_check_or_alloc; 317 318 instance = scsi_host_alloc(&gvp11_scsi_template, 319 sizeof(struct gvp11_hostdata)); 320 if (!instance) { 321 error = -ENOMEM; 322 goto fail_check_or_alloc; 323 } 324 325 instance->irq = IRQ_AMIGA_PORTS; 326 instance->unique_id = z->slotaddr; 327 328 regs->secret2 = 1; 329 regs->secret1 = 0; 330 regs->secret3 = 15; 331 while (regs->CNTR & GVP11_DMAC_BUSY) 332 ; 333 regs->CNTR = 0; 334 regs->BANK = 0; 335 336 wdregs.SASR = ®s->SASR; 337 wdregs.SCMD = ®s->SCMD; 338 339 hdata = shost_priv(instance); 340 if (gvp11_xfer_mask) 341 hdata->wh.dma_xfer_mask = gvp11_xfer_mask; 342 else 343 hdata->wh.dma_xfer_mask = default_dma_xfer_mask; 344 345 hdata->wh.no_sync = 0xff; 346 hdata->wh.fast = 0; 347 hdata->wh.dma_mode = CTRL_DMA; 348 hdata->regs = regs; 349 350 /* 351 * Check for 14MHz SCSI clock 352 */ 353 epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000); 354 wd33c93_init(instance, wdregs, dma_setup, dma_stop, 355 (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10 356 : WD33C93_FS_12_15); 357 358 error = request_irq(IRQ_AMIGA_PORTS, gvp11_intr, IRQF_SHARED, 359 "GVP11 SCSI", instance); 360 if (error) 361 goto fail_irq; 362 363 regs->CNTR = GVP11_DMAC_INT_ENABLE; 364 365 error = scsi_add_host(instance, NULL); 366 if (error) 367 goto fail_host; 368 369 zorro_set_drvdata(z, instance); 370 scsi_scan_host(instance); 371 return 0; 372 373 fail_host: 374 free_irq(IRQ_AMIGA_PORTS, instance); 375 fail_irq: 376 scsi_host_put(instance); 377 fail_check_or_alloc: 378 release_mem_region(address, 256); 379 return error; 380 } 381 382 static void __devexit gvp11_remove(struct zorro_dev *z) 383 { 384 struct Scsi_Host *instance = zorro_get_drvdata(z); 385 struct gvp11_hostdata *hdata = shost_priv(instance); 386 387 hdata->regs->CNTR = 0; 388 scsi_remove_host(instance); 389 free_irq(IRQ_AMIGA_PORTS, instance); 390 scsi_host_put(instance); 391 release_mem_region(z->resource.start, 256); 392 } 393 394 /* 395 * This should (hopefully) be the correct way to identify 396 * all the different GVP SCSI controllers (except for the 397 * SERIES I though). 398 */ 399 400 static struct zorro_device_id gvp11_zorro_tbl[] __devinitdata = { 401 { ZORRO_PROD_GVP_COMBO_030_R3_SCSI, ~0x00ffffff }, 402 { ZORRO_PROD_GVP_SERIES_II, ~0x00ffffff }, 403 { ZORRO_PROD_GVP_GFORCE_030_SCSI, ~0x01ffffff }, 404 { ZORRO_PROD_GVP_A530_SCSI, ~0x01ffffff }, 405 { ZORRO_PROD_GVP_COMBO_030_R4_SCSI, ~0x01ffffff }, 406 { ZORRO_PROD_GVP_A1291, ~0x07ffffff }, 407 { ZORRO_PROD_GVP_GFORCE_040_SCSI_1, ~0x07ffffff }, 408 { 0 } 409 }; 410 MODULE_DEVICE_TABLE(zorro, gvp11_zorro_tbl); 411 412 static struct zorro_driver gvp11_driver = { 413 .name = "gvp11", 414 .id_table = gvp11_zorro_tbl, 415 .probe = gvp11_probe, 416 .remove = __devexit_p(gvp11_remove), 417 }; 418 419 static int __init gvp11_init(void) 420 { 421 return zorro_register_driver(&gvp11_driver); 422 } 423 module_init(gvp11_init); 424 425 static void __exit gvp11_exit(void) 426 { 427 zorro_unregister_driver(&gvp11_driver); 428 } 429 module_exit(gvp11_exit); 430 431 MODULE_DESCRIPTION("GVP Series II SCSI"); 432 MODULE_LICENSE("GPL"); 433